Spool for industrial thread



April 25, 1939. G. w. 'KRENTLER SPOOL FOR INDUSTRIAL THREAD Filed Nov. 6, 1937 'PaterItecI ApnZEIQa PATENT OFFICE 7 2,150.24: sroor. ron mnus'ranu. 'rnaasn Gilbert w. .Krentler, Lexington, Ky, moi to Dean & Shark Company, Inc., Lawrencebnrg, Ky., a-eorporation of Michigan Application November 6, 1937, Serial No. 173,05!

This invention relates to a spool or holder for industrial thread, and an object of the invention is to provide a head or base for the spool, which head is formed from a single blank of sheet metal and with a suitable projection for the ready securing to the base of a cylindrical core.

A further object is to provide a suitable cylin drlcal casing for enclosing and protecting the 10 thread wound upon the spool and which casing is securely and detachably held in place upon the base by the form of the base itself and the nature of the casing.

It is also an object of the invention to reduce 16 the cost of manufacture of the spool and simplify the'construction and to provide certain other new and useful features in the construction, arrangement and combination of parts, all as hereinafter more fully set forth, reference being had to the accompanying drawing, in which- Figure 1 is a side elevation of the device with the casing applied and partly broken away to more fully disclose the construction;

Fig. 2 is a longitudinal section of the spool detached and showing in dot and dash lines the outline of the thread when wound thereon, and

Fig. 3 is a plan view of Figure 2.

The spool comprises a cylindrical tubular core I which is preferably formed of a suitable fibrous material, and 2 indicates the base of the spool as a whole, this base being formed of sheet metal from a single blank which is pressed into shape to provide a conical portion 3 which terminates at its lower end in a short cylindrical portion 4 provided with a bead 5 along its lower edge.

The conical base 3 is preferably of truncated conical form and providedwith an upstanding tubular nipple 6 which is formed with a helical rib or screwthread I, the lower end of this tubular nipple 6 being formed with a horizontal shoulder 8 at its lower end where it merges into the conical wall 3 of the base.

The tubular core I is preferably formed with an internal helically formed rib or thread to engage the thread of the nipple 6 so that the core may be quickly and securely applied to the base by screwing the core upon the nipple 6 with the lower end of the core firmly seated upon the shoulder 8 to rigidly hold the core in place and prevent its ready detachment.

A quantity of industrial thread is wound upon the core I as indicated at 9 with this body of thread seated against the conical base 2, the upper end of the body of wound thread terminating in a conical end I0.

(Cl. 24Z118) To cover the spool and thread wound thereon and protect the thread against becoming soiled in handling of the spool and also to securely shut oil the light and prevent the color of the thread from being faded, a cylindrical casing II having l a cap I2 for closing its upper end tightly, is provided, and this casing is preferably formed of a fibrous material with its lower end open and of a slightly less internal diameter than the external diameter of the cylindrical portion 4 of 10 the base so that when the casing is applied to the base, this open lower end will engage the conical wall 3 of the base adjacent the cylindrical portion 4, and by pressure downwardly upon the casing, the lower end thereof will be expanded l6 slightly to slip over and frlctionally engage the cylindrical portion 4 of the base with its lower end edge seated upon the rib 5 of the base. The casing may, therefore, be very quickly and conveniently applied to the spool to cover the thread wound thereon and protected against dirt and light,'the frictional engagement of the lower end of the casing with the base of the spool, being suilicient to hold the casing in place but permitting its ready removal.

The manner of attaching the core I to the base 2 is a material feature of the present invention as the core may be quickly secured to the base by simply screwing it down upon the tubular so screwthreaded projection 6 and when screwed thereon with considerable force, the end of the core will seat very firmly upon the shoulder 8 of the base, the core contracting upon the projection and rigidly securing the core to the base.

With the present construction a spool is provided which is very cheap to manufacture in that the base is formed of sheet metal which by the use of a suitable die or other means may be quickly formed from a single blank with. the conso ical formation and with the screwthreaded tubular projection integral therewith.

Having thus fully described my invention, what I claim is:

1. In a spool for commercial thread, a truncated conical base, an annular shoulder on said base at the plane of truncation of the base, a cylindrical projection to seat at its lower end upon said shoulder, a cylindrical core to fit over said cylindrical projection, said cylindrical projection forming a reinforcement and rigid support for the lower end of said core, said core and the conical surface of said base being adapted so that thread may be wound about them, the outer diameter of said core being substantially equal to the diameter of said conical base at the plane of truncation ofsaid base. 2. In a spool for commercial thread, a truncated conical base, a projecting tubular screwthreaded member extending from the plane of truncation of said base, and a tubular core interi nally 'screwthreaded at one end to screw upon said tubular projection and seat at its end upon said base to form a permanent rigid connection for said core to said base and to reinforce said connection, said core and the conical surface of said base being adaptedso that thread may be wound about them, the outer diameter of said core being substantially equal to the diameter of said conical base at the plane of truncation of said base. 3. A spool for industrial thread comprising a tubular core formed with an internal screwthread at one end, and'a base formed of sheet 20 metal with a truncated conical portion formed with an integral tubular screwthreaded nipple at its upper end and an annular shoulder connecting said nipple and conical portion of said base, said nipple being screwed into said screwthreaded end of said core to firmly attachsaid core to said base with the end of said core firmly seated upon said annular shoulder of the base, said base being also formed with said conical portion terminating in a short cylindrical portion with a rib at the free edge of said cylindrical portion, said cylindrical portion being adapted to engage within the open end of a cylindrical casing, the open end of said casing being adapted to engage the conical portion of the base and when forced longitudinally thereon, to expand and frictionally engage the cylindrical portion ofbsaid base and seat at its lower edge upon said "GILBERT W. KREN'ILER o 

